I have experienced the same problem as OP's since I changed to hardwire kit with constant power supply. The firmware is what you sent me through PM, and I remember the version number is 190401***. I am not sure if that's the 0614s version with G sensor triggered start/stop recording parking mode, or the latest low bit continuous recording parking mode.You should use the 0614 Auto parking mode firmware if you hardwired dashcam already, and PM you the FW already, please check your inbox message!
It happens when the dashcam detects its writing speed too slow. It might ok for your computer usage, but not okay for dashcam usage now! So suggest you change to a new card for this dashcam!
Either way, the cam was playing up since it's connected to the hardwire kit, especially after ignition of the car. The WIFI was cut, green light was not flashing, and it's dimmer than normal. The recording also stopped, and unplug + plug in the microUSB lead didn't help the dashcam to recover. When I plugged in the power supply from original cigaret lighter adaptor, the dashcam revived and started to work normally.
I am not sure if this indicates a bad quality hardwire kit (it's the second set from the same seller, previous one only keep supplying for a few minutes then cam shut itself), or it's something to do with the firmware?
I have recorded the problem as the following video, however missed the very last bit when I was plugging the original power adaptor, so you won't see it restarts.